矢量电推进系统的气动-推进耦合模型

doi:10.7527/S1000-6893.2022.27672

Abstract

Abstract:

This paper proposes an aerodynamic/propulsion coupling model to realize real-time and rapid evaluation of the aerodynamic and propulsion performance of the vector electric propulsion system by combining the theoretical model with the engineering experience model. To accurately describe the aerodynamic/propulsion coupling effect of the system， we first establish the propulsion model of the ducted fan by combining the propulsion enhancement coefficient formula and the engineering experience model. The aerodynamic model of the ducted fan is then established and modified based on the propulsion influence. Afterwards， the influence of the suction effect induced by the ducted fan on the wing is analyzed， and the coupled propulsion lift enhancement model of the wing established according to the tilting of the ducted fan. Finally， through integration of all the models into the airframe coordinate system， the aerodynamic/propulsion coupling model of the vector electric propulsion system is obtained， subsequently verified， and analyzed based on the CFD simulation. The results show that the aerodynamic/propulsion coupling model proposed in this paper can accurately describe the thrust enhancement of the duct and the lift enhancement of the wing， maintaining high accuracy with extremely fast computing speed and meeting the real-time computing requirements of the dynamics system and flight control system.

Key words: electric propulsion system, aerodynamic/propulsion coupling, real-time calculation, electric ducted fan, lift enhancement of wing

CLC Number:

V211

Jiyu XIA, Zhou ZHOU, De XU, Zhengping WANG. Aerodynamic/propulsion coupling model of vector electric propulsion system[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(11): 127672-127672.

Figures/Tables 11

Fig.1

Fig.2

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Fig.5

Table 1

Comparison of Cst between isolated duct and duct system with wing

$T r / N$	$C s t$
$T r / N$	V_∞=10 m/s	V_∞=20 m/s	V_∞=30 m/s
10	1.536 4/1.522 4	1.260 5/1.255 3	1.035 0/1.034 4
15	1.638 7/1.623 8	1.386 9/1.378 9	1.149 3/1.146 9
20	1.744 3/1.727 1	1.459 5/1.449 0	1.226 5/1.222 1

Table 1

Fig.6

Fig.7

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Aerodynamic/propulsion coupling model of vector electric propulsion system

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